ARK Mainsail Testnet Update December 1st, 2025
Mainsail Update – v0.0.1-rc.8 is live!
A fresh public testnet update is ready with important improvements across core, API, consensus, and developer tooling.
Highlights of this release:
🔸Major cleanup & refactors in constants, contracts, and kernel to reduce runtime deps and unify shared types.,
🔸Improved consensus storage and crypto-message handling (safer BlockHeader / LockProof deserialization, cleaner serialized storage).,
🔸Fixes across API modules (HTTP, EVM, transaction-pool), improving correctness and reliability.,
🔸New flags added to env:paths:clear for clearing consensus and tx pool data.,
🔸Updated & tightened ESLint rules, TypeScript improvements, and general dependency updates.,
🔸New e2e workflow for public network sync.,
Full changelog: https://github.com/ArkEcosystem/mainsail/releases/tag/0.0.1-rc.8
In the short time since the release of the new Mainsail Testnet there have been improvements, updates and complete testnet upgrades. Each update and all the work has been siloed in the form of technical blogs from weekly dev reports and in the ARK Community Discord. From now on, we will be sharing these updates outside of those channels as well.
If you would like to run a testnet validator and contribute to testing the new ARK EVM, join the ARK Community Discord https://discord.gg/arkcoin, and jump into the Mainsail Testnet channel to get install and upgrade instructions.
